Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2012

Share Count and Par Value Data Related to Stockholders' Equity

Share count and par value data related to stockholders’ equity are as follows:

	As of
	December 31,     2012		December 31,     2011
Preferred Stock
Par value per share	$	0.01	$	0.01
Shares authorized		10,000,000		10,000,000
Shares outstanding		0		0
Common Stock—Class A
Par value per share	$	0.01	$	0.01
Shares authorized		150,000,000		150,000,000
Shares issued		72,151,857		72,151,857
Shares outstanding		50,908,267		52,095,166
Treasury stock
Shares held		21,243,590		20,056,691

Roll forward of Class A Common Shares Outstanding

A roll forward of Class A common shares outstanding is as follows:

	Year Ended December 31,
	2012		2011
Balance at the beginning of the year		52,095,166		55,711,325
Repurchases		(1,473,863)		(4,353,801)
Stock options, rights and ESPP issuances		246,625		593,574
Restricted share issuances		242,238		215,510
Restricted share forfeitures		(130,119)		(17,138)
Shares withheld for tax obligations		(71,780)		(54,304)
Balance at the end of the period		50,908,267		52,095,166